How to use the Cortex A5 linux port, we have downloaded the Cortex A5 designstart to the Mps3 development board.

sir , I have followed the example above and run the iota-tiny linux system on the MPS3 board. Now I can sign in the system using terminal .however I can't make a file transfer between host machine and the board.because this minimal system don not have the module required. So I just go to the yocto official website and want to learn how to build the software(like openssh) into the image. However ,I've tried some times,and I can not succeed on Arm platform like the website example showed. I want to know is there any tutorial I can successfully build some file transfer sofeware into the image for arm A5 platform，so i can run a helloworld on the MPS3 board or send some files from host machine to the board.
Thanks ！！！
the yocto website I followed are:
1.wiki.yoctoproject.org/.../Cookbook:Example:Adding_packages_to_your_OS_image
2.docs.yoctoproject.org/.../index.html

sir , I have followed the example above and run the iota-tiny linux system on the MPS3 board. Now I can sign in the system using terminal .however I can't make a file transfer between host machine and the board.because this minimal system don not have the module required. So I just go to the yocto official website and want to learn how to build the software(like openssh) into the image. However ,I've tried some times,and I can not succeed on Arm platform like the website example showed. I want to know is there any tutorial I can successfully build some file transfer sofeware into the image for arm A5 platform，so i can run a helloworld on the MPS3 board or send some files from host machine to the board.
Thanks ！！！
the yocto website I followed are:
1.wiki.yoctoproject.org/.../Cookbook:Example:Adding_packages_to_your_OS_image
2.docs.yoctoproject.org/.../index.html